I have learnt about 3rd person singular affirmative but still confuse with these senteces:<br/><br/><b><u>it will help</u> us to stay healthy.</b><br/><br/><b><u>it will helps</u> us to stay healthy.</b><br/><br/><b><u>he will eat</u> the whole meat.</b><br/><br/><b><u>he will eats</u> the whole meat.</b><br/>